Peters



(No Model.)

E. HUBBARD. PROCESS 0F MANUFACTURING PAPER PAILS. No. 389,964.

5571.1atentedSept. 25, 41888.

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UNTTED STATES PATENT Ormea.

EBER HUBBARI), OI" CHICAGO, ILLINOIS, ASSIGNOR TO CHARLES S. BURTON,

TRUSTEE, OF SAME PLACE.

PROCESS OF MANUFACTURING PAPER PAILS.

SPECIFICATION' forming part of Letters Patent; No. 389,964, datedSeptember 25, 1888.

(No model.)

To all whom it may concern:

Be it known that I, HUBnARD, a citizen of the United States, residing atChicago, county of Cook, State of Illinois, have invented certain newand useful Improvements in the Process of Manufacturing Paper Pails,which are fully set forth in the following specification, referencebeing had to the accompanying drawings, forming a part thereof.

1o Figure lis a partly sectional elevation of a metal form on which thepail is wound,with the body portion of the pail thereon, and a devicefor forming the bottom from pulp. Fig. 2 is a section at the line x rv,Fig. l; and Fig.

i5 3 is a vertical section of a pail formed by my invention.

This invention consists inthe process, llereinafter claimed, for makinga paper pail integral, bottom and sides without joint, as of zo onepiece, as ifmolded directly from pulp, but nevertheless having the bodyor sides niade of what is technically known as wound77 inaterial-thatis, stratified paper formed of layer upon layer of paperpulp, or, tospeak more exactly, film upon film. Such material is commonly producedby the process of winding the continuous iilrn as it comes from thecylinder of the paper-making machine about a revolving form, from whichprocess it takes the name 3o ot' wound material or wound paper; but thesame structure may obviously be produced by superposing successive filmsby other means than winding, and I use the name to indicate such aproduct however produced.

The bottom of my pail may be made either of wound or molded material.\Vhen made of wound material, it will be cut ont of a sheet of suitablethickness which has been formed in the usual manner by winding, as above4o described,upon a cylinder and cut lengthwise, so as to be removedtherefrom, and spread out in a flat sheet. XVhen formed of moldedmaterial, it will be molded directly upon the form upon which the bodyis wound, as more particularly hereinafter described; but in either easeit is formed in such manner and in such relation to the body portion asto be integral therewith even when it is not homogeneous. This result Iaccomplish as follows:

5o The body portion or side of the pail is formed by winding upon aform, A, a continuous film ot' paper-pulp drawn directly from the vat bythe cylinder in the usual manner of making paper, the Winding beingcontinued until the requisite thickness is obtained. This forni A is ametal cylinder or frustum of a cone, according to the shape of the pailto be made. As illustrated it is of the latter form. It may be hollow,but has a bottom, A', of sufficient thickness to serve the purpose of 6oforming the bottom of the pail, as hereinafter explained.

The body of the pail (indicated by the letter P) is wound as described,with a portion, p, protruding beyond the bottom of the form A. The 'formis then placed bottom upward upon a supporting bed or table, B, under apistoni'ollower or die, D, which may be reciprocated vertically by anywell-known means. (Not illustrated.) TherimE,havingthetaperingpart R,corresponding to the taper of the form A, is set down over and aroundthe upper or smaller end ofthe pail on the form. The iuner diameter ofthis rim is only enough greater than that ofthe form to allow for thethickness of the paper body of the pail, so that the straight portion ofsaid rim when it is placed, as described, about the pail and form commences at the plane of the outer surface of the llat head Aof the AformA, and, extending upward ther'eform, forms the side walls of acylindrical chamber, into which is now placed the material of which thebottom is to be formed. This may be a sheet of wound paper pulp eut orformed of proper-size for such bottom and laid in upon the bottom (or,in its inverted position, the top) of the form, or it may be paper-pulpin mere mass. In either case the piston or follower F now descends intothe rim R, which it closely tits, and forces the bottom material closelydown upon the head of the form A and upon the lip or flange of the bodyp, which is also mashed down by the piston, so that a complete union ismade between the said lip and the bottom material, both it and thebottom being in the condition of fresh-t1 c., undriedHpulp, the onlydifference being that the said iiange p is stratified, while the bottommay be unstratited mass; but the union effected is as complete as andloo perfectly similar to that which occurs between the successive filmsor layers of which the stratified body, including said flange, iscomposed.

If a chine is desired, the follower F will have a. portion cut awayaround its lower edge atf, into which the necessary amount of materialwill be forced as the follower descends upon the bottom. The followerbeing removed, the rim R may also be removed and the pail on the form A.placed in suitable place to become dry, when it may be ornamented orotherwise finished, as desired.

To facilitate the removal of the rim R, it is preferably made in severalpieces, as illustrated, which are held together by a hoop, It, in themanner of the staves of an ordinary tub or barrel, and, this hoop beingfirst removed, the said separate pieces or staves r may be withdrawnlaterally away from the paper pail, thus avoiding` the danger of' inntilating the pail, as might occur in drawing the rim offlongitudinally, since it may not relieve easily from the freshpaper-pulp.

My process differs from any process which has heretofore been employedfor the manufacture of pails or like articles in that the body andbottom are both in the condition of raw pulp when brought into contactfor the purpose of uniting, so that they unite by the complete cohesionof the pulp which forms them respectively, and the structure whencompleted is integral and not merely cemented together.

I am aware that paper tubes made after the usual manner of formingpaperfrom pulp have been taken while yet moist and used as the body andportion of the bottom of a pail to which the remaining portion of thebottom, which was formed of paper strips and paperpulp and mueilaginonssubstance intermingled, was united by contact and pressure; but thismethod of forming pails is distinguished from mine in that the tubenecessarily has become true paper (although still moist) before thebottom is applied to it, and such bottom cannot be securely joined tosuch body by a mere contact and cohesion, and in such process ofmanufacture reliance has to be placed upon interweaving the strips ofpaper which are used in the formation of the body and upon the use ofmucilaginous substance to complete the union of the parts. I do notclaim such a process; but my invention is dependent upon and limited tothe fact that the condition ofthe parts when brought into contact forthe purpose of uniting is that of pulp and not of paper.

I claiml. rIhe process of making paper pails, which consists of thefollowing steps: first, depositing the pulp in successive layers orcourses about a form to constitute the body of the pail; second,depositing on the end of the form on which the body is thus wound, andwhile said body is still wet pulp, a further quantity of wetpulp,la1;iping a portion ofsuch body, and molding said further quantityby suitable pressure against the cnd of the form to form thebottom,wliereby the body and bottom come into contact while both arestill wet pulp, and in that condition cohere and become integral, and,third, drying the entire pail, substantially as set forth.

2. The process of making paper pails with a chine, which consists in thefollowing steps: first, depositing wet pulp in successive layers orcourses about a form to constitute a body; second, depositing on the endof' such form while the body is still wet pulp a further quant-ity ofwet pulp, lapping a portion of the body to form the bottom of the pail;third, molding the pulp deposited for the bottom and thelapped portionof the body to form a chine at the margin of the bottom of'the pail;fourth, removing the molding device, and, fifth, drying thc entire pail,bottom, and chine on the form, substantially as set forth.

EBEE HU BBARD.

Attest:

(li-ms. S. BURTON, E. F. BURTON.

